Random Reboots (BlissOS 16)

[Zorakie]

Hello,
I have seen a similar topic raised but with some arguing, but no actual issue identification.
Anyway, as per the title, I have installed BlissOS 16, but I am fighting with completely random reboots.

Or maybe it is not a full reboot...
Completely randomly, while I am doing something, or even when the computer sits idle on the login screen, it can just "reboot".
But I believe it is not a full reboot, the laptop won't show the manufacturer logo, there is no screen poweroff typical for a reboot, it only switches immediately to the BlissOS loading animation, reloads, and lands on login screen, all apps closed...

If you need some error log or something, please suggest what is needed and how to extract it, and I will gladly provide.

Testing device:
UMAX Visionbook 12WRx
Intel Celeron N4020
4 GB LPDDR4
128 GB EMMC
11,6" IPS HD 1366x768

Any guidance, please?